Expanding pintle for hinges



June 11, 1935. F. WJBEcKER El AL EXPANDING PINTLE FOR HINGES Filed Aug. 17, 1933 I INVENTOR5 fiederzcl? I L Bec%s r;

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Patented June 11, 1935 UNITED STATES EXPANDING PINTLE, FOR HINGES Frederick W. Becker and'Reginald- P. Kinsley,

Albany, N. Y., assignors rto Watervliet Tool; Company, Inc.,'Albany, N.. -Y., a corporation of New York 7 Application August 17, 1933', Serial'fio. 685,511: 2 Claims. (01. 16 -168) The present invention relates to an improvement indoor hinge or pintle pinsyand more especially for automobile door hinges, andhasfor its principal feature the provision of means '5- whereby the pintlemay be expanded in, and

locked in expanded position in the hinge bores,

thereby to tighten the pintle, in its fitting, to

thereby adjust for wear and to eliminate rattle and noise and to prolong the life of the hinge and pintle structure through the consequent elimination of looseness.

' Automobile door hinges are, as is well known,

subject to rapid deterioration and wear, due to vibratory forces, and as there is no provision in hinges, provided with a solid pintle, for take up, deterioration is rapid and cumulative, and in a short time the hinge connections become loose, and permits the door to rattle badly.

The present hinge pintle has several novel features to meet the conditions above noted, one is in the provision of an integral pintle, of complete length to fit the coacting hinge structures, hollow to receive an expanding pilot pintle, threaded to lock the expander in operative positionto prevent its-backingout, and loss, and finally, is provided with a self-breaching and keying means for firmly seating -thepintle in one of the coacting hinge elements thereby to be operatively held inone hinge element against self-rotation and against subsequent pintle expanding forces, when the pintle is reset and re-expanded. This latter feature also permits the pintle to be expanded, in situ, any number of times without the necessity of removal of the pintle from the hinge.

Thus the subsequent adjusting, re-expansions of the pintle is a matter of only a few moments attention.

These and other features will be apprehended as the herein description proceeds and it is obvious that modifications may be made in the structure herein without departing from the spirit hereof or the scope of the appended claims.

In the drawing,

Fig. 1 is a fragmentary, transverse, sectional view of a door hinge with the present improvement, also in section, located in operative position therein;

Fig. 2 is a view of the pintle in elevation;

Fig. 3 is a fragmented view of the pintle showing a modified form of knurling under the head;

Fig. 4 is a sectional view taken on the line 4-4, Fig. 3, looking in the direction of the arrows;

Fig. 5 is a sectional view, taken on the line 55, Fig. 2, looking in the direction of the arw 7 G-is an elevational view of the expander pi t' il i Fig.7 is anelevational view of the expander pilot lock screw;' r Y 5 Fig. 8 is an elevational View of the hinge pintle with the'slotscut longer-to embrace all the trunnions of the hinge joint; I

Fig: 9'- is an elevational view of an expander set punch; r

r 10 shows the hinge pintle slightly expanded, with the set punch in the operative position of causing; said expansion; and

-Fig. 11 is a fragmentary sectional view of the head portion of a pintle showing a provision of means fora knock out'for'the expander pintle. The hinge pintle comprises a'cylindrical body "having" a head 2 thereon, and the body, as in Fig.1,"is bored with a compound bore l4 and I5 from its bottom to receive'therein an expander pin 6 having a cylindrical lea'd or pilot 3, a tapered expanding portion 4, and.- a straight, larger cylindrical lower stem 5. The compound bore is so contoured as to fit the stem 5, with the taper lof said pin fitting a corresponding taper in said bore.- The expander pilot is separately shown in Fig. 6.

-Th'e'cylindricalbored body |-of the pintle is slotted, as in Figs. 2 and 5, with a plurality of radial slots 8, which cut into the inner pintle bore I 5, and as in Fig. 5, this leaves the pintle body I with plural sectors 1 which are flexibly expandible by the expander pilot 6, when it is forced upwardly into the compound bore of said pin.

To cause such expansion, a set punch l0, Fig. 9, having a reduced cylindrical end H, may be introduced into the bore in body I, and is in contact with the lower end of the interiorly located expander pilot 6, and by means of a hammer, the set punch drives the expander pilot upwardly into the compound bore, and causes the sectors 1 to bulge radially outwardly, about as in Fig. 10, shown dotted, and thus expand in the bore of the swinging hinge section B, Fig. 1. In the above noted structure the length of slots 8, are so arranged that the expanding sections of body I are limited to the bore in the hinge section D, or swinging hinge B.

In the alternate form of pintle shown in Fig. 8, the slots 8 are cut longer so as to embrace the bores in the knuckle sections E and F of the fixed or other hinge section A, shown dotted in Fig. 8. Thus the friction and expansion can be arranged to act along, substantially, the entire active bore the compound bore in body I, as in Fig. 1, and is tightly screwed into contact With-the lower end of expander pilot 6, thus to maintain the pilot in set position and to prevent" its working out. The set screw I2 may always be removed, insub sequent settings and replaced after re-expansion.

As a means to cause the hinge pintle to be firmly fastened in its hinge position. in the. knuckle F of fixed hinge A, the upper portion of the body I, immediately under the head '2,is so knurled as to create a bore broaching portion 4',

Fig. 2, the knurling being arranged in a helical like formation. When the pintlethus treated is driven home to its head in lug F, the teeth of the knurling 4 are driven into the surface of the bore in lug F, and thus lock the pintle in said bore against rotation; Further,;the knurling being helical, it permits the expanding of the sectors 1 as described for Fig. 10, while the pintleis in its operative hinge coactingposition, as the helical knurling 4' prevents the pintle from mo i upwardly under theforce of the hammer blows 'on setpunch l0. I t

A straight form of knurlingl" is shown in Figs. 3 and. 4, and this can be used in new hinges with the same function as described for Figs. 1 and 2.

As above described, the principle ofboth forms of knurled and slotted hinge pintles are thesame, andwhen properly set in either, new'or worn hinge members, the expanded pintles take out all the play-and thus eliminate all looseness and noise. As wear advances the hinge pintles maybe additionally expanded from time to time, as required, and the set screw [2, set up to follow up and lock the inward adjustment of pin 6.

It is sometimes required that the hinge pintles must be removed from the hinges, and in order to accomplish this the pintle may have the internal pilot bore extended up through its head portion,

as at M, Fig. 11, to form aknockout bore, whereby the expanded pin 6, after removal of set screw l2, may be knocked downwardly to remove it from the pintle, and the pintle may then be knocked upwardly, to remove it from the hinge. The extended bore [4, may be closed by a headless or other screw l3, Fig. 11, to protect the pintle bore against the entrance of moisture.

It will thus be noted that the present improvement is unitary in structure, and is completely assembled as a single piece. In this assembled formit may be introducedl into the hinge bore and thus operates as a solid pintle for the hinge until wear'i's encountered, after which it may be expanded as above set forth.

- Having thus described our invention what we claimis:

I 1. In a door hinge, comprising a member having spaced knuckles, a member having an intermediate knuckle between the spaced knuckles, the three knuckles having alined bores,'a single piece pintle having one end headed, and having locking means at said headed end, and having an axial bore therein said, axial bore having large .;and small cylindrical portions intermediately connect: ed by a wedgingportiomthe large cylindrical portion of the bore being threaded, a. plurality of peripheral slots in said pintle extending substantially the'entire length of said pintle .and into said axial bore toform expander sections in the three alined bores of the said knuckles, a solid wedge ended expansion pilot in said axial bore with'its wedge end fitting the wedging portion of said axial bore and an independent set screw tightly engaging the threaded end of said axial boreto engage said wedge ended pilot to hold the latter in position under the stress of expansion of said pintle.

2. A pintle, as in claim 1, in which said pintle is locked against movement in one of the spaced lugs by the said locking means and is slidably fitted to the intermediate knuckle and the other spaced knuckle, whereby the intermediate knuckle can be rotated upon the pintle and the pintle is free to slidably f oreshorten in the said intermediate and spaced knuckles as the expan-- sion pilot is driven into thepintle to expand the expander sections. j

FREDERICK. W. BECKER. REGINALD P. KINSLEY. 

